GNU xorriso

https://gnu.org/s/xorriso/Xorriso creates, loads, manipulates, and writes ISO 9660 filesystem images with Rock Ridge extensions. Files can be copied in and out. Optionally it supports hard links, ACLs, xattr, and MD5 checksums. The session results get written to optical media or to filesystem objects.

A special property of xorriso is that it needs neither an external ISO 9660 formatter program nor an external burn program for CD, DVD, or BD, but rather incorporates the libraries of libburnia-project.org . Thus GNU xorriso depends only on fundamental operating system facilities.

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